2003-01-14 01:17:44 +00:00
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/* packet-brdwlk.c
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* Routines for decoding MDS Port Analyzer Adapter (FC in Eth) Header
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* Copyright 2001, Dinesh G Dutt <ddutt@andiamo.com>
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*
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2004-07-18 00:24:25 +00:00
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* $Id$
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2003-01-14 01:17:44 +00:00
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*
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2006-05-21 04:49:01 +00:00
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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2003-01-14 01:17:44 +00:00
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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2005-09-17 00:02:31 +00:00
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#include <epan/etypes.h>
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2003-01-14 01:17:44 +00:00
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#define BRDWLK_MAX_PACKET_CNT 0xFFFF
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#define BRDWLK_TRUNCATED_BIT 0x8
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2003-10-30 02:06:13 +00:00
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#define BRDWLK_HAS_PLEN 0x1
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2003-01-14 01:17:44 +00:00
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#define FCM_DELIM_SOFC1 0x01
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#define FCM_DELIM_SOFI1 0x02
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#define FCM_DELIM_SOFI2 0x04
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#define FCM_DELIM_SOFI3 0x06
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#define FCM_DELIM_SOFN1 0x03
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#define FCM_DELIM_SOFN2 0x05
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#define FCM_DELIM_SOFN3 0x07
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#define FCM_DELIM_SOFF 0x08
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#define FCM_DELIM_SOFC4 0x09
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#define FCM_DELIM_SOFI4 0x0A
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#define FCM_DELIM_SOFN4 0x0B
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#define FCM_DELIM_EOFT 0x01
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#define FCM_DELIM_EOFDT 0x02
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#define FCM_DELIM_EOFN 0x03
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#define FCM_DELIM_EOFA 0x04
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#define FCM_DELIM_EOFNI 0x07
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#define FCM_DELIM_EOFDTI 0x06
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#define FCM_DELIM_EOFRT 0x0A
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#define FCM_DELIM_EOFRTI 0x0E
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#define FCM_DELIM_NOEOF 0xF0
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#define FCM_DELIM_EOFJUMBO 0xF1
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static const value_string brdwlk_sof_vals[] = {
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{FCM_DELIM_SOFI1, "SOFi1"},
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{FCM_DELIM_SOFI2, "SOFi2"},
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{FCM_DELIM_SOFI3, "SOFi3"},
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{FCM_DELIM_SOFN1, "SOFn1"},
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{FCM_DELIM_SOFN2, "SOFn2"},
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{FCM_DELIM_SOFN3, "SOFn3"},
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{FCM_DELIM_SOFF, "SOFf"},
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{0, NULL},
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};
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static const value_string brdwlk_eof_vals[] = {
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{FCM_DELIM_EOFDT, "EOFdt"},
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{FCM_DELIM_EOFA, "EOFa"},
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{FCM_DELIM_EOFN, "EOFn"},
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{FCM_DELIM_EOFT, "EOFt"},
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{0, NULL},
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};
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static int hf_brdwlk_sof = -1;
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static int hf_brdwlk_eof = -1;
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static int hf_brdwlk_error = -1;
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static int hf_brdwlk_vsan = -1;
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static int hf_brdwlk_pktcnt = -1;
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static int hf_brdwlk_drop = -1;
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2003-10-30 02:06:13 +00:00
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static int hf_brdwlk_plen = -1;
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2005-11-05 02:03:21 +00:00
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static int hf_brdwlk_error_plp = -1;
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static int hf_brdwlk_error_ef = -1;
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static int hf_brdwlk_error_nd = -1;
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static int hf_brdwlk_error_tr = -1;
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static int hf_brdwlk_error_badcrc = -1;
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static int hf_brdwlk_error_ff = -1;
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static int hf_brdwlk_error_jumbo = -1;
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static int hf_brdwlk_error_ctrl = -1;
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2003-01-14 01:17:44 +00:00
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/* Initialize the subtree pointers */
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static gint ett_brdwlk = -1;
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2005-11-05 02:03:21 +00:00
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static gint ett_brdwlk_error = -1;
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2003-01-14 01:17:44 +00:00
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static gint proto_brdwlk = -1;
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static guint16 packet_count = 0;
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static gboolean first_pkt = TRUE; /* start of capture */
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static dissector_handle_t data_handle;
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static dissector_handle_t fc_dissector_handle;
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2005-11-05 02:03:21 +00:00
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static const true_false_string tfs_error_plp = {
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"Packet Length is PRESENT",
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"Packet length is NOT present"
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};
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static const true_false_string tfs_error_ef = {
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"This is an Empty Frame",
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"Frame is NOT empty"
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};
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static const true_false_string tfs_error_nd = {
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"This Frame has NO Data",
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2006-01-05 13:01:08 +00:00
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"This frame carries data"
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2005-11-05 02:03:21 +00:00
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};
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static const true_false_string tfs_error_tr = {
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"This frame is TRUNCATED",
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"This frame is NOT truncated"
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};
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static const true_false_string tfs_error_crc = {
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"This Frame has a BAD FC CRC",
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"This frame has a valid crc"
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};
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static const true_false_string tfs_error_ff = {
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"Fifo is Full",
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"Fifo is NOT full"
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};
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static const true_false_string tfs_error_jumbo = {
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"This is a JUMBO FC Frame",
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"This is a NORMAL FC Frame"
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};
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static const true_false_string tfs_error_ctrl = {
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"Ctrl Characters inside the frame",
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"No ctrl chars inside the frame"
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};
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2003-01-14 01:17:44 +00:00
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2005-11-05 02:03:21 +00:00
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static void
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dissect_brdwlk_err(proto_tree *parent_tree, tvbuff_t *tvb, int offset)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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guint8 flags;
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flags = tvb_get_guint8 (tvb, offset);
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if(parent_tree){
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item=proto_tree_add_uint(parent_tree, hf_brdwlk_error,
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tvb, offset, 1, flags);
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tree=proto_item_add_subtree(item, ett_brdwlk_error);
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}
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proto_tree_add_boolean(tree, hf_brdwlk_error_plp, tvb, offset, 1, flags);
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if (flags&0x01){
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proto_item_append_text(item, " Packet Length Present");
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}
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flags&=(~( 0x01 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_ef, tvb, offset, 1, flags);
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if (flags&0x02){
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proto_item_append_text(item, " Empty Frame");
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}
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flags&=(~( 0x02 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_nd, tvb, offset, 1, flags);
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if (flags&0x04){
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proto_item_append_text(item, " No Data");
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}
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flags&=(~( 0x04 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_tr, tvb, offset, 1, flags);
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if (flags&0x08){
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proto_item_append_text(item, " Truncated");
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}
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flags&=(~( 0x08 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_badcrc, tvb, offset, 1, flags);
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if (flags&0x10){
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proto_item_append_text(item, " Bad FC CRC");
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}
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flags&=(~( 0x10 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_ff, tvb, offset, 1, flags);
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if (flags&0x20){
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proto_item_append_text(item, " Fifo Full");
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}
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flags&=(~( 0x20 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_jumbo, tvb, offset, 1, flags);
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if (flags&0x40){
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proto_item_append_text(item, " Jumbo FC Frame");
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}
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flags&=(~( 0x40 ));
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proto_tree_add_boolean(tree, hf_brdwlk_error_ctrl, tvb, offset, 1, flags);
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if (flags&0x80){
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proto_item_append_text(item, " Ctrl Char Inside Frame");
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}
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flags&=(~( 0x80 ));
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2003-01-14 01:17:44 +00:00
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}
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/* Code to actually dissect the packets */
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static void
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dissect_brdwlk (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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2008-05-14 01:47:41 +00:00
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proto_item *ti, *hidden_item;
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2003-07-21 21:30:10 +00:00
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proto_tree *brdwlk_tree = NULL;
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2003-01-14 01:17:44 +00:00
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tvbuff_t *next_tvb;
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2003-10-30 02:06:13 +00:00
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guint8 error, eof, sof;
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2003-01-14 01:17:44 +00:00
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int hdrlen = 2,
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offset = 0;
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2003-10-30 02:06:13 +00:00
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gint len, reported_len, plen;
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2003-01-14 01:17:44 +00:00
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guint16 pkt_cnt;
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2003-07-21 21:52:32 +00:00
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gboolean dropped_packets;
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2003-01-14 01:17:44 +00:00
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Boardwalk");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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2003-10-30 02:06:13 +00:00
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pinfo->vsan = (tvb_get_ntohs (tvb, offset) & 0xFFF);
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sof = (tvb_get_guint8 (tvb, offset) & 0xF0) >> 4;
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if ((sof == FCM_DELIM_SOFI3) || (sof == FCM_DELIM_SOFI2) || (sof == FCM_DELIM_SOFI1)
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|| (sof == FCM_DELIM_SOFI4)) {
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pinfo->sof_eof = PINFO_SOF_FIRST_FRAME;
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}
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else if (sof == FCM_DELIM_SOFF) {
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pinfo->sof_eof = PINFO_SOF_SOFF;
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}
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2003-01-14 01:17:44 +00:00
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if (tree) {
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ti = proto_tree_add_protocol_format (tree, proto_brdwlk, tvb, 0,
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hdrlen, "Boardwalk");
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brdwlk_tree = proto_item_add_subtree (ti, ett_brdwlk);
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proto_tree_add_item (brdwlk_tree, hf_brdwlk_sof, tvb, offset, 1, 0);
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proto_tree_add_item (brdwlk_tree, hf_brdwlk_vsan, tvb, offset, 2, 0);
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2003-07-21 21:30:10 +00:00
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}
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2003-01-23 07:01:52 +00:00
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2003-07-21 21:30:10 +00:00
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/* Locate EOF which is the last 4 bytes of the frame */
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len = tvb_length_remaining(tvb, hdrlen);
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reported_len = tvb_reported_length_remaining(tvb, hdrlen);
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if (reported_len < 4) {
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/*
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* This packet is claimed not to even have enough data for
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* a 4-byte EOF.
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* Don't try to process the EOF.
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*/
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;
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}
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else if (len < reported_len) {
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/*
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* This packet is claimed to have enough data for a 4-byte EOF,
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* but we didn't capture all of the packet.
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* Slice off the 4-byte EOF from the reported length, and trim
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* the captured length so it's no more than the reported length;
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* that will slice off what of the EOF, if any, is in the
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* captured length.
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*/
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reported_len -= 4;
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if (len > reported_len)
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len = reported_len;
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}
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else {
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/*
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* We have the entire packet, and it includes a 4-byte EOF.
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* Slice it off, and put it into the tree if we're building
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* a tree.
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*/
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len -= 4;
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reported_len -= 4;
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offset = tvb_reported_length(tvb) - 4;
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2003-07-21 21:52:32 +00:00
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pkt_cnt = tvb_get_ntohs (tvb, offset);
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2003-07-21 21:30:10 +00:00
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if (tree) {
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2003-07-21 21:52:32 +00:00
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proto_tree_add_uint (brdwlk_tree, hf_brdwlk_pktcnt, tvb, offset,
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2, pkt_cnt);
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2003-07-21 21:30:10 +00:00
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}
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2003-07-21 21:52:32 +00:00
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dropped_packets = FALSE;
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if (pinfo->fd->flags.visited) {
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/*
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* This isn't the first pass, so we can't use the global
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* "packet_count" variable to determine whether there were
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* any dropped frames or not.
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* We therefore attach a non-null pointer as frame data to
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* any frame preceded by dropped packets.
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*/
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if (p_get_proto_data(pinfo->fd, proto_brdwlk) != NULL)
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dropped_packets = TRUE;
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} else {
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/*
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* This is the first pass, so we have to use the global
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* "packet_count" variable to determine whether there were
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* any dropped frames or not.
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*
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* XXX - can there be more than one stream of packets, so that
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* we can't just use a global variable?
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*/
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|
|
|
if (pkt_cnt != packet_count + 1) {
|
|
|
|
if (!first_pkt &&
|
|
|
|
(pkt_cnt != 0 || (packet_count != BRDWLK_MAX_PACKET_CNT))) {
|
|
|
|
dropped_packets = TRUE;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Mark this frame as having been preceded by dropped
|
|
|
|
* packets. (The data we use as the frame data doesn't
|
|
|
|
* matter - it just matters that it's non-null.)
|
|
|
|
*/
|
|
|
|
p_add_proto_data(pinfo->fd, proto_brdwlk, &packet_count);
|
2003-07-21 21:30:10 +00:00
|
|
|
}
|
2003-01-14 01:17:44 +00:00
|
|
|
}
|
2003-07-21 21:52:32 +00:00
|
|
|
|
|
|
|
if (tree) {
|
2008-05-14 01:47:41 +00:00
|
|
|
hidden_item = proto_tree_add_boolean (brdwlk_tree, hf_brdwlk_drop,
|
2003-07-21 21:52:32 +00:00
|
|
|
tvb, offset, 0, dropped_packets);
|
2008-05-14 01:47:41 +00:00
|
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
2003-07-21 21:52:32 +00:00
|
|
|
}
|
2003-01-14 01:17:44 +00:00
|
|
|
}
|
|
|
|
packet_count = pkt_cnt;
|
2005-11-05 02:03:21 +00:00
|
|
|
|
|
|
|
error=tvb_get_guint8(tvb, offset+2);
|
|
|
|
dissect_brdwlk_err(brdwlk_tree, tvb, offset+2);
|
2003-10-30 02:06:13 +00:00
|
|
|
|
|
|
|
eof = tvb_get_guint8 (tvb, offset+3);
|
|
|
|
if (eof != FCM_DELIM_EOFN) {
|
|
|
|
pinfo->sof_eof |= PINFO_EOF_LAST_FRAME;
|
|
|
|
}
|
|
|
|
else if (eof != FCM_DELIM_EOFT) {
|
|
|
|
pinfo->sof_eof |= PINFO_EOF_INVALID;
|
2003-01-14 01:17:44 +00:00
|
|
|
}
|
|
|
|
|
2003-07-21 21:30:10 +00:00
|
|
|
if (tree) {
|
|
|
|
proto_tree_add_item (brdwlk_tree, hf_brdwlk_eof, tvb, offset+3,
|
|
|
|
1, 0);
|
|
|
|
}
|
2003-10-30 02:06:13 +00:00
|
|
|
|
|
|
|
if ((error & BRDWLK_HAS_PLEN) && tree) {
|
|
|
|
/* In newer Boardwalks, if this bit is set, the actual frame length
|
|
|
|
* is also provided. This length is the size between SOF & EOF
|
|
|
|
* including FC CRC.
|
|
|
|
*/
|
|
|
|
plen = tvb_get_ntohl (tvb, offset-4);
|
|
|
|
plen *= 4;
|
|
|
|
proto_tree_add_uint (brdwlk_tree, hf_brdwlk_plen, tvb, offset-4,
|
|
|
|
4, plen);
|
|
|
|
|
2003-10-30 03:15:26 +00:00
|
|
|
#if 0
|
|
|
|
/* XXX - this would throw an exception if it would increase
|
|
|
|
* the reported length.
|
|
|
|
*/
|
2003-10-30 02:06:13 +00:00
|
|
|
if (error & BRDWLK_TRUNCATED_BIT) {
|
|
|
|
tvb_set_reported_length (tvb, plen);
|
|
|
|
}
|
2003-10-30 03:15:26 +00:00
|
|
|
#endif
|
2003-10-30 02:06:13 +00:00
|
|
|
}
|
2003-01-14 01:17:44 +00:00
|
|
|
}
|
|
|
|
|
2003-07-21 21:30:10 +00:00
|
|
|
next_tvb = tvb_new_subset (tvb, 2, len, reported_len);
|
2003-01-14 01:17:44 +00:00
|
|
|
if (fc_dissector_handle) {
|
|
|
|
call_dissector (fc_dissector_handle, next_tvb, pinfo, tree);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2003-07-21 21:52:32 +00:00
|
|
|
static void
|
|
|
|
brdwlk_init(void)
|
|
|
|
{
|
|
|
|
packet_count = 0;
|
|
|
|
first_pkt = TRUE;
|
|
|
|
}
|
2003-01-14 01:17:44 +00:00
|
|
|
|
2006-05-21 04:49:01 +00:00
|
|
|
/* Register the protocol with Wireshark */
|
2003-01-14 01:17:44 +00:00
|
|
|
|
|
|
|
/* this format is require because a script is used to build the C function
|
|
|
|
that calls all the protocol registration.
|
|
|
|
*/
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_brdwlk (void)
|
|
|
|
{
|
|
|
|
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_brdwlk_sof,
|
|
|
|
{"SOF", "brdwlk.sof", FT_UINT8, BASE_HEX, VALS (brdwlk_sof_vals),
|
|
|
|
0xF0, "SOF", HFILL}},
|
|
|
|
{ &hf_brdwlk_eof,
|
|
|
|
{"EOF", "brdwlk.eof", FT_UINT8, BASE_HEX, VALS (brdwlk_eof_vals),
|
2003-10-30 02:06:13 +00:00
|
|
|
0x0F, "EOF", HFILL}},
|
2003-01-14 01:17:44 +00:00
|
|
|
{ &hf_brdwlk_error,
|
2005-11-05 02:03:21 +00:00
|
|
|
{"Error", "brdwlk.error", FT_UINT8, BASE_HEX, NULL, 0x0, "Error",
|
2003-01-14 01:17:44 +00:00
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_pktcnt,
|
|
|
|
{"Packet Count", "brdwlk.pktcnt", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
|
|
"", HFILL}},
|
|
|
|
{ &hf_brdwlk_drop,
|
|
|
|
{"Packet Dropped", "brdwlk.drop", FT_BOOLEAN, BASE_DEC, NULL, 0x0,
|
|
|
|
"", HFILL}},
|
|
|
|
{ &hf_brdwlk_vsan,
|
|
|
|
{"VSAN", "brdwlk.vsan", FT_UINT16, BASE_DEC, NULL, 0xFFF, "",
|
|
|
|
HFILL}},
|
2003-10-30 02:06:13 +00:00
|
|
|
{ &hf_brdwlk_plen,
|
|
|
|
{"Original Packet Length", "brdwlk.plen", FT_UINT32, BASE_DEC, NULL, 0x0, "",
|
|
|
|
HFILL}},
|
2005-11-05 02:03:21 +00:00
|
|
|
{ &hf_brdwlk_error_plp,
|
|
|
|
{"Packet Length Present", "brdwlk.error.plp", FT_BOOLEAN, 8, TFS(&tfs_error_plp), 0x01, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_ef,
|
|
|
|
{"Empty Frame", "brdwlk.error.ef", FT_BOOLEAN, 8, TFS(&tfs_error_ef), 0x02, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_nd,
|
|
|
|
{"No Data", "brdwlk.error.nd", FT_BOOLEAN, 8, TFS(&tfs_error_nd), 0x04, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_tr,
|
|
|
|
{"Truncated", "brdwlk.error.tr", FT_BOOLEAN, 8, TFS(&tfs_error_tr), 0x08, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_badcrc,
|
|
|
|
{"CRC", "brdwlk.error.crc", FT_BOOLEAN, 8, TFS(&tfs_error_crc), 0x10, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_ff,
|
|
|
|
{"Fifo Full", "brdwlk.error.ff", FT_BOOLEAN, 8, TFS(&tfs_error_ff), 0x20, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_jumbo,
|
|
|
|
{"Jumbo FC Frame", "brdwlk.error.jumbo", FT_BOOLEAN, 8, TFS(&tfs_error_jumbo), 0x40, "",
|
|
|
|
HFILL}},
|
|
|
|
{ &hf_brdwlk_error_ctrl,
|
|
|
|
{"Ctrl Char Inside Frame", "brdwlk.error.ctrl", FT_BOOLEAN, 8, TFS(&tfs_error_ctrl), 0x80, "",
|
|
|
|
HFILL}},
|
2003-01-14 01:17:44 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_brdwlk,
|
2005-11-05 02:03:21 +00:00
|
|
|
&ett_brdwlk_error,
|
2003-01-14 01:17:44 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_brdwlk = proto_register_protocol("Boardwalk",
|
|
|
|
"Boardwalk", "brdwlk");
|
|
|
|
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_brdwlk, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
|
2003-07-21 21:52:32 +00:00
|
|
|
register_init_routine(&brdwlk_init);
|
2003-01-14 01:17:44 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
|
|
This format is required because a script is used to find these routines and
|
|
|
|
create the code that calls these routines.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
proto_reg_handoff_brdwlk(void)
|
|
|
|
{
|
|
|
|
dissector_handle_t brdwlk_handle;
|
|
|
|
|
|
|
|
brdwlk_handle = create_dissector_handle (dissect_brdwlk, proto_brdwlk);
|
|
|
|
dissector_add("ethertype", ETHERTYPE_BRDWALK, brdwlk_handle);
|
2003-10-30 02:06:13 +00:00
|
|
|
dissector_add("ethertype", 0xABCD, brdwlk_handle);
|
2003-01-14 01:17:44 +00:00
|
|
|
data_handle = find_dissector("data");
|
|
|
|
fc_dissector_handle = find_dissector ("fc");
|
|
|
|
}
|